What do you do when you have no idea?

I'm out of ideas. Should have seen this coming.
I would really like to make a cp map but then, nothing in particular comes into my mind. I've been sitting down in front of a piece of paper for like 2 hours doing nothing but staring into it.

So, I thought I would just ask you guys. Should I do something else i.e sleep? Or can you give me a bit of a inspiration to develop? What do you do when you hit a wall?

Try playing the game and then seeing what aspects of gameplay you enjoy, or if you have ideas that you'd like to try out. Like, take a critical eye to your existing favorite maps and see why the devs did what they did, extrapolate that idea, and put it into your own words - with 10 other map ideas from other sources, etc.

-Go back through old ideas. Something piqued my interest about it the first time around, maybe now that some time has passed I can figure out the next piece.
-Browse architecture and landscape images obsessively and keep a cool images folder.
-Focus on something else. I've always found that taking a break and focusing on something else (play a game you've been meaning to play, start a project at home, whatever) helps me get a fresh perspective.
-Comedy Option: Juggle (it helps me think)